Departamento de Ciências da Engenharia e da Arquitectura
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Percorrer Departamento de Ciências da Engenharia e da Arquitectura por Objetivos de Desenvolvimento Sustentável (ODS) "11:Cidades e Comunidades Sustentáveis"
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- The 15-minute city in Porto, Portugal: accessibility for the elderlyPublication . Guerreiro, Maria; Dinis, Maria Alzira Pimenta; Sucena, Sara; Pereira, Madalena Sofia Araujo; Silva, Isabel; Ferreira, Diogo; Silva Moreira, RuiThe concept of the 15-Minute City aims to enhance urban accessibility by ensuring that essential services are within a short walking distance. This study evaluates the accessibility of Porto, Portugal, particularly for the elderly, by assessing urban density, permeability, and walkability, with a specific focus on crossings and ramps. A five-step methodology was employed, including spatial analysis using QGIS and Place Syntax Tool, proximity assessments, and an in-situ survey of crossings and ramps in the CHP. The results indicate that while the city of Porto offers a dense and walkable urban environment, significant accessibility challenges remain due to inadequate ramp distribution. The data collection identified 80 crossings, of which only 60 were listed in OpenStreetMap, highlighting data inconsistencies. Additionally, 18 crossings lacked curb ramps, posing mobility barriers for elderly residents. These findings highlight the need of infrastructure improvements to support inclusive urban mobility. The study also proposes an automated method to enhance ramp data collection for broader applications. Addressing these gaps is crucial for achieving the equity and sustainability goals of the 15-Minute City model, ensuring that aging populations can navigate urban spaces safely and efficiently.
- Automating city accessibility constraints mapping through AI‐assisted scanning of street view imageryPublication . Silva Moreira, Rui; Moita, Sérgio; Torres, José Manuel; Alberto Ribeiro Gouveia, Feliz; Dinis, Maria Alzira Pimenta; Ferreira, Diogo; Pereira, Madalena Sofia Araujo; Guerreiro, Maria João S.; Zhou, GuyueUrban environments often pose challenges for individuals with mobility impairments due to inadequate pedestrian infrastructure. In addition, the lack of accurate mapping of accessibility features limits the ability to monitor and address these constraints effectively. This paper introduces a framework for Automating City Accessibility Mapping using AI (ACAMAI), that is, provides an AI-assisted pipeline for the automated identification and geolocation of urban accessibility constraints using Google Street View (GSV) panoramas. The ACAMAI pipeline comprises two main stages: (i) training a YOLOv8 object detector to recognise accessibility-related features, such as curb ramps, missing ramps, obstacles and surface problems, in 2D sidewalk images; and (ii) scanning 360° GSV panoramas by extracting multiple perspective views to be analysed by the trained model. The model was trained on a combination of international (Project Sidewalk Dataset—PSD) and local (Porto Dataset—PTD) datasets, achieving high performance across classes, including 91% recall and 85% precision for curb ramps. In the panorama scanning stage, using a fine angular iterative step (2°) maximised the recall, reaching 90% for curb ramps and 93% for obstacles in a locally annotated dataset (GSV Panorama Porto Dataset—GSV-PPD). Although this improved detection coverage, it also led to a high number of redundant predictions, which contributed to a reduced overall precision. Finally, identified constraints are georeferenced and mapped onto OpenStreetMap (OSM), supporting scalable and inclusive urban planning.
- Cities and climate change: combining bibliometric trends and city-level evidence to understand the connections between urban resilience and adaptive capacityPublication . Leal Filho, Walter; Bichueti, Roberto Schoproni; Dinis, Maria Alzira Pimenta; Begum, Halima; O'Hare, Paul; Malakar, Krishna; Kouassi, Jean-Luc; Danumah, Jean HomianClimate change poses escalating challenges to urban systems, intensifying risks from extreme temperatures, flooding, sea-level rise, and socio-environmental inequalities. Cities are increasingly recognised as critical arenas for climate adaptation, where resilience and adaptive capacity shape the capacity to anticipate, absorb, and respond to climate-related impacts. This study maps research on urban resilience and adaptive capacity through a bibliometric analysis of Web of Science publications (2010–2023), identifying dominant thematic clusters via keyword co-occurrence and collaboration patterns via co-authorship networks. To connect research trends with practice, this study also reports on a qualitative meta-synthesis of twelve published city case studies from diverse geographic and socio-economic contexts. Explicitly linking bibliometric themes with city-level adaptation evidence, this study identifies areas of convergence (e.g., governance, nature-based solutions, and risk assessment) and persistent gaps, particularly in the operationalisation of social equity, participation, and maladaptation risks. The findings provide an integrated evidence base that may help inform future urban climate adaptation research and policy.
- Green correction facilities: lessons from case studies in sustainability in prisonsPublication . Leal Filho, Walter; Rocha Júnior, Valdemiro; Dinis, Maria Alzira Pimenta; Luetz, Johannes; Aver, Gisleine; Andrade Guerra, José BaltazarPrisons are inherently resource-intensive institutions, consuming substantial amounts of energy, water, and materials. The adoption of sustainable practices within these environments offers a significant potential to reduce carbon emissions, minimize waste, and conserve natural resources—thereby contributing to broader environmental goals. Initiatives such as energy-efficient lighting, renewable energy integration, and water conservation measures have demonstrated effectiveness in lowering operational costs and reducing the financial burden on taxpayers. Despite these clear advantages, research on environmental sustainability in correctional settings remains limited. In response to this gap, this paper explores the critical need for sustainability practices within prison systems, emphasizing the role of environmental stewardship in modern correctional management. By using an analysis of the literature and illustrative case studies, the study examines a range of initiatives designed to reduce waste, conserve energy, and support sustainable food production. The analysis highlights successful examples where eco-friendly practices have not only lowered operational costs but also enhanced rehabilitation outcomes for incarcerated individuals. Additionally, it provides an analysis of the challenges and opportunities associated with environmental sustainability in prisons and advocates the need for a comprehensive approach to correctional management that aligns ecological responsibility with prisoner education and community engagement. Ultimately, the findings suggest that adopting environmental sustainable practices can transform prisons into centers of positive change, benefiting both the environment, incarcerated persons, and society at large.
- A IA no panorama Luso-BrasileiroPublication . Manuel Borges Gouveia, LuisInteligência Artificial no horizonte Lusófono - uma confluência de vontades e linguagens.
- Trajectories of circular economy in cities: key patterns and emerging pathwaysPublication . Aina, Yusuf; Almulhim, Abdulaziz I.; Salami, Babatunde Abiodun; Swart, Julia; Abubakar, Ismaila Rimi; Dinis, Maria Alzira Pimenta; Sharifi, AyyoobUrbanisation and escalating resource pressures have intensified the need for systemic approaches to sustainable development, positioning the circular economy (CE) as a critical framework for cities. This study reviews academic literature to examine current trends, challenges, and forward-looking strategies for CE implementation in urban contexts. Using a search process aligned with the PRISMA protocol, 668 peer-reviewed articles were analysed through inductive content analysis. The findings reveal that CE practices in cities are increasingly shaped by global sustainability agendas, particularly in relation to SDGs 9 to 12. The analysis identifies eight thematic clusters that characterise urban CE pathways: urban planning and the built environment, energy and mobility systems, waste and resource management, water and urban agriculture, citizen engagement, governance and regulation, technological innovation, and socio-cultural transformation. A conceptual framework integrating eight thematic clusters is presented, illustrating how cities transition from linear to circular systems through policy alignment, digital innovation, and multisectoral collaboration. Case studies from global urban centres illustrate strategies ranging from smart infrastructure and circular procurement to social inclusion and localised production, all of which enable CE advancement. These findings reinforce the view of CE as a multidimensional approach capable of fostering urban resilience, environmental stewardship, and inclusive economic growth.